松树枯梢病菌对百菌清的敏感性研究  

Variation of Chlorothalonil Sensitivity within Sphaeropsis sapinea in China

作　　者：吴小芹[1] 洪英娣[1] 

机构地区：[1]南京林业大学森林资源与环境学院,南京210037

出　　处：《南京林业大学学报（自然科学版）》2000年第4期16-20,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"九五"攻关项目! ( 95 -0 4-0 1)

摘　　要：应用杀菌剂百菌清对从中国不同地理区域和不同针叶树上收集的 55个松树枯梢病菌(Sphaeropsissapinea)菌株进行孢子萌发敏感性及菌丝生长敏感性测定 ,并采用相对分生孢子萌发率 (RCG)和相对菌丝体生长量 (RMG)进行敏感性评估。结果表明 ,S .sapinea的分生孢子对百菌清极为敏感 ,且不同菌株间的敏感性差异很大 (RCG 1 %～ 1 0 0 %) ;而菌丝对百菌清的敏感性较小 ,不同菌株间的敏感性差异不大 (RMG 78.4%～ 96.4%)。各菌株孢子对百菌清的敏感性与其地理来源、寄主及林分发病程度关系不大 ;菌丝对百菌清的敏感性与地理来源关系也不大 。Fifty five S.sapinea isolates were collected on different conifers from 13 provinces in China.Variation of sensitivity to fungicide chlorothalonil within the isolates was measured and evaluated on the basis of relative conidium germination (RCG)and relative mycelium growth (RMG).The results showed that conidia of S.sapinea were more sensitive to chlorothalonil than mycelia,and the variale range of sensitivity in conidia among isolates was also larger (RCG?1%～100%)than that in mycelia(RMG?78.4%～96.4%).It suggested that conidia sensitivity to chlorothalonil had low correlation with geographic sources, hosts and disease incidence, but mycelia sensitive to chlorothalonil seemed to have some relation with losts and disease incidence.

关 键 词：松树枯梢病菌 百菌清 敏感性 杀菌剂 

分 类 号：S763.13[农业科学—森林保护学]